A discrepancy between anticipated reward and obtained reward with no increase in resistance to extinction

One of two varied magnitude-of-reward groups, trained in a runway under conditions designed to preclude anticipation of the smaller reward magnitude, nevertheless failed to show increased resistance to extinction, a result consistent with the sequential hypothesis. Since this group must have experienced frustration or dissonance in acquisition, its failure to show increased resistance to extinction is inconsistent with those hypotheses. This result suggests either that frustration or dissonance is irrelevant in determining extinction performance or that both hypotheses have failed to specify and identify the conditions that are both necessary and sufficient for increasing resistance to extinction.